My Internet provider just installed a 2,5/1Gbps Internet connection and I’ve asked the guys to run a couple of their fiber to connect my router (HP Prodesk with OPNsense) to my server. I didn’t know that the fiber is single mode and all the SFP+ sold used now seems to be all for multi mode fiber (www.bargainhardware.co.ukfor example). The cable is about 30m, can I use a 810nm SFP+ or is it definitely better to use a 1310nm?
The cool thing about 1310nm light is that it will pass down either multimode or single mode fiber.
At that short of a distance, you should be able to use MM 1310nm SFPs.
As long as the SFPs can do the signalling speed needed by the link then I see no reason why it shouldn’t work.